- #1
Pual Black
- 92
- 1
Homework Statement
let ##\vec{r}## be a vector from origin to the point (x,y,z) and let ##{\vec{r}\,}'## be a vector from the origin to the point (x',y',z'). Evaluate the following expressions
##1. \triangledown r ##
##2.\triangledown\frac{1}{r}##
##3.\triangledown\cdot r##
##4.\triangledown\times r##
##5.\triangledown^{2} r##
##6.\triangledown^{2} \frac{1}{r}##
##7.\triangledown\frac{1}{\mid\vec{r}-{\vec{r}\,}'\mid}##
##8.\triangledown\frac{1}{{\mid\vec{r}-{\vec{r}\,}'\mid}^2}##
The attempt at a solution
i have added my solution for the first few equations. My problem is page 3 and page 4. I can't get the right answer.